#bridge_deck__bridge  an upper deck where a ship is steered and the captain stands
  supertype:  #upper_deck__upperdeck  a higher deck
  part:  #pilothouse
  subtype:  #conning_tower__conningtower  a raised bridge on a submarine; often used for entering and exiting
  subtype:  #flying_bridge__flybridge__fly_bridge__flybridge__moneky_bridge  the highest navigational bridge on a ship; a small (often open) deck above the pilot house

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